Angular contact ball bearing suitable for high speed, high rigidity and heavy load
By adjusting the diameter of the rolling elements and the pitch diameter, optimizing the raceway ratio of the inner and outer rings, and using high-hardness materials and cages, the problem of insufficient stiffness in ultra-high-speed bearings has been solved, achieving high-speed, high-rigidity, and high-load application effects.
Patent Information
- Application Number
- CN202520432607.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-12
AI Technical Summary
Existing ultra-high speed angular contact ball bearings have insufficient stiffness and low load-bearing capacity in high-speed applications, which limits their application in high-stiffness and high-load scenarios.
By adjusting the diameter range of the rolling elements to 0.5H≤Dw≤0.6H, the pitch diameter to 0.95dm≤P≤0.99dm, and optimizing the raceway radius ratios of the inner and outer rings (OSCI and OSCE), using high-hardness bearing steel and silicon nitride materials, and combining them with resin or plastic cages, the rigidity and load-bearing capacity of the bearing are improved.
Under high-speed and high-load conditions, the rigidity and load-bearing capacity of the bearing are significantly improved, expanding the application scenarios and demonstrating better performance.
Smart Images
Figure CN223825445U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of angular contact ball bearings, and particularly relates to an angular contact ball bearing suitable for high-speed, high-rigidity and heavy-load applications. Background Art
[0002] In the field of bearing technology, some key parameters play an important role in understanding bearing performance and design. H represents the height of the bearing section, which is obtained by the formula (D - d) / 2, where D is the outer ring outer diameter and d is the inner ring inner diameter; P is the pitch diameter of the rolling elements, which refers to the position of the center of the rolling elements relative to the center of the inner and outer rings; dm is the average bearing diameter, calculated as (D + d) / 2; the inner ring OSCI represents the ratio of the inner ring raceway radius ri to the ball diameter Dw, and the outer ring OSCE is the ratio of the outer ring raceway radius re to the ball diameter Dw.
[0003] At present, there are mainly two design types of angular contact ball bearings for high-speed applications: one is the high-speed, high-load capacity (LC) design, which uses balls with a diameter ≥ 0.6H, and the values of the inner ring OSCI and the outer ring OSCE are in the range of 0.515 < OSCI < 0.53 and 0.515 < OSCE < 0.53, and the pitch diameter P is equal to the average diameter dm of the section; the other is the ultra-high-speed design (HS), which uses balls with a diameter less than 0.5H, and the ranges of the inner ring OSCI and the outer ring OSCE are greater than 0.53, and the pitch diameter P is also equal to the average diameter dm of the section. However, in the HS design, although the values of its OSCI and OSCE are high, it does not show higher stiffness than the LC design in actual applications. More importantly, due to the very small ball diameter Dw in the HS design, its load-carrying capacity is much lower than that of the LC design, which greatly limits its wider application and performance improvement in some high-speed application scenarios with high requirements for bearing stiffness and load-carrying capacity. There is an urgent need for a new design or technology to solve these problems. Content of the Utility Model
[0004] The purpose of the utility model is to provide an angular contact ball bearing suitable for high-speed, high-rigidity and heavy-load applications, and its advantage is to improve the rigidity of the bearing under high-speed and high-load application conditions.
[0005] The above technical purpose of the utility model is achieved through the following technical solutions: an angular contact ball bearing suitable for high-speed, high-rigidity and heavy-load applications, including an outer ring, an inner ring and a plurality of rolling elements arranged between the outer ring and the inner ring, and a cage is arranged between the outer ring and the inner ring; the diameter D of the rolling elements w is set to 0.5H ≤ D w≤0.6H, the pitch diameter P between the rolling elements is set to 0.95dm ≤ P ≤ 0.99dm, and the circumferential space size S between two consecutive rolling elements between the outer ring and the inner ring is set to 0.1D w ≤ S < 0.3D w .
[0006] The present utility model is further set as follows: the ratio OSCI of the inner ring raceway radius ri to the diameter Dw of the rolling element is set to 0.515 < OSCI < 0.53, and the ratio OSCE of the outer ring raceway radius re to the diameter Dw of the rolling element is set to 0.515 < OSCE < 0.53.
[0007] The present utility model is further set as follows: the outer ring and the inner ring are made of bearing steel with a hardness of HRC 60 - 65.
[0008] The present utility model is further set as follows: the rolling elements are made of bearing steel with a hardness of HRC 60 - 65 or silicon nitride material.
[0009] The present utility model is further set as follows: the cage is a window-type cage made of resin or plastic material.
[0010] In summary, the present utility model has the following beneficial effects:
[0011] 1. By setting the range of the ball diameter to 0.5H ≤ Dw ≤ 0.6H and reducing the pitch diameter P between the rolling elements to 0.95dm ≤ P ≤ 0.99dm, the number of rolling elements between the outer ring and the inner ring is increased, so that the rigidity of the bearing is improved under the application conditions of high speed and high load, and the bearing can meet the requirements of high speed, high load and high rigidity during operation, greatly improving the performance of the existing bearing and having a wider application scenario compared with the traditional bearing. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is the overall structural schematic diagram of this embodiment;
[0013] Figure 2 is the overall structural cross-sectional view of this embodiment;
[0014] Figure 3 is the experimental result comparison diagram of the present application and the traditional design in terms of speed-rigidity and speed-friction.
[0015] Reference numerals: 1, outer ring; 2, inner ring; 3, rolling element; 4, cage. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0016] The following further describes the present utility model in detail with reference to the accompanying drawings.
[0017] Example 1:
[0018] Reference Figure 1 and Figure 2 , an angular contact ball bearing suitable for high-speed, high-rigidity and heavy loads, includes an outer ring 1, an inner ring 2 and a number of rolling elements 3 arranged between the outer ring 1 and the inner ring 2. A cage 4 is provided between the outer ring 1 and the inner ring 2. The cage 4 has a radial pocket for accommodating the rolling elements 3. The diameter Dw of the rolling elements 3 is set to 0.5H ≤ Dw ≤ 0.6H, the pitch diameter P between the rolling elements 3 is set to 0.95dm ≤ P ≤ 0.99dm, and the circumferential space size S between two consecutive rolling elements 3 between the outer ring 1 and the inner ring 2 is set to 0.1Dw ≤ S < 0.3Dw. By increasing the diameter of the rolling elements 3 and reducing the pitch diameter between the rolling elements 3, the number of rolling bodies between the outer ring 1 and the inner ring 2 is increased, so that the rigidity of the bearing is improved under the application conditions of high speed and high load, so that the bearing can meet the requirements of high speed, high load and high rigidity during operation. By reference Figure 3 it can be seen that compared with the traditional design in this application, as the speed increases, the stiffness is always greater than the traditional design and the friction force is always less than the traditional design.
[0019] Specifically, the ratio OSCI of the raceway radius ri of the inner ring 2 to the diameter Dw of the rolling element 3 is set to 0.515 < OSCI < 0.53, and the ratio OSCE of the raceway radius re of the outer ring 1 to the diameter Dw of the rolling element 3 is set to 0.515 < OSCE < 0.53.
[0020] Specifically, the outer ring 1 and the inner ring 2 are made of bearing steel with a hardness of HRC 60-65. The rolling elements 3 are made of bearing steel with a hardness of HRC 60-65 or silicon nitride material. The cage 4 is a window-type cage 4 made of resin or plastic.
[0021] Brief description of the working principle: By increasing the diameter of the rolling elements 3 and reducing the pitch diameter between the rolling elements 3, the number of rolling bodies between the outer ring 1 and the inner ring 2 is increased, so that the rigidity of the bearing is improved under the application conditions of high speed and high load.
[0022] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.
Claims
1. An angular contact ball bearing suitable for high speed, high rigidity, and heavy load, comprising an outer ring (1), an inner ring (2), and a plurality of rolling elements (3) disposed between the outer ring (1) and the inner ring (2), wherein a cage (4) is provided between the outer ring (1) and the inner ring (2); characterized in that, The diameter Dw of the rolling element (3) is set such that 0.5H ≤ Dw ≤ 0.6H, the pitch diameter P between the rolling elements (3) is set such that 0.95dm ≤ P ≤ 0.99dm, and the circumferential space size S between two consecutive rolling elements (3) between the outer ring (1) and the inner ring (2) is set such that 0.1Dw ≤ S < 0.3Dw.
2. The angular contact ball bearing suitable for high-speed, high-rigidity, heavy-load applications according to claim 1, characterized in that, The ratio OSCI of the raceway radius ri of the inner ring (2) to the diameter Dw of the rolling element (3) is set such that 0.515 < OSCI < 0.53, and the ratio OSCE of the raceway radius re of the outer ring (1) to the diameter Dw of the rolling element (3) is set such that 0.515 < OSCE < 0.
53.
3. The angular contact ball bearing suitable for high-speed, high-rigidity, heavy-load applications according to claim 1, characterized in that, The outer ring (1) and the inner ring (2) are made of bearing steel with a hardness of HRC 60 - 65.
4. An angular contact ball bearing suitable for high-speed, high-rigidity, heavy-load applications according to claim 3 or 1, characterized in that, The rolling element (3) is made of bearing steel with a hardness of HRC 60 - 65 or silicon nitride material.
5. The angular contact ball bearing suitable for high-speed, high-rigidity, heavy-load applications according to claim 4, characterized in that, The cage (4) is a window-type cage (4) made of resin or plastic material.